For fn 509 - SureFire XC3 Compact 550 Lumens LED Weapon Light

I switched from a TLR-7a to this and the light seems built more sturdy, is brighter and the front glass is of higher quality/easier to clean. The only bad is that it only has two inserts to adjust the switch position/how much the light sticks out. Basically you have to choose between having the switch covering too much of the trigger guard or having the light stick out so far that it doesn't quite seat in holsters made for the TLR7. I used my dremel tool to take a little bit off the plastic insert and was able to get the perfect positioning for me.